I'm posting this here as the official thread about the crowdsourcing tagger seems closed (at least I don't see the "add post" button so this is my assumption) and this seemed like the next best place.
Last year on the original thread for the crowdsourcing project, マイコーさん said he intended to add a "require confirmation before sending" toggle like the grammar tagger has to the dictionary tagger if the feature was well received. I haven't found anyone else mentioning this since then, so I may be alone in this, but I would find it very helpful to have the option for the dictionary tagger as well, if only to avoid misclicks that would lower my accuracy and the accuracy of the tagging project itself.
It's not *wonderful*, but I've got something in there. Currently, it's on the dashboard widget. Since you're not doing just one term but possibly several, instead of having a confirm button appear, it will require 2 taps to check the box.